Effects of dry ice on gas permeability of nano-silver-impregnated Populus nigra and Fagus orientalis

IET Nanobiotechnology
H R TaghiyariF Aminzadeh Liyafooee

Abstract

Effects of dry-ice treatment (frozen CO(2) at -78.5°C) on gas permeability of untreated and nano-silver-impregnated poplar and beech specimens were studied here on the basis of their biological structure and woody mass as well as their vessel element types. A 200 ppm aqueous dispersion of silver nano-particles was used for impregnation; the size range of silver nano-particles was 20-80 nm. Dry-ice treatment increased gas permeability by 87 and 45% in poplar and beech, respectively. Nano-silver impregnation also increased gas permeability by 190 and 89% in poplar and beech, respectively. Dry-ice treatment on nano-silver-impregnated specimens increased gas permeability even more (31% increase in poplar but only 0.96% in beech). It may be concluded that dry-ice treatment on solid woods may be used as a practical method to increase permeability in species that because of their biological structures are impermeable; since this method alters the biological structure slightly and consequently decreases mechanical strength of solid woods insignificantly, it may substitute methods such as incising to increase permeability.

References

Jun 30, 2011·Nanoscale Research Letters·Pramod Warrier, Amyn Teja

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Citations

Jun 4, 2016·IET Nanobiotechnology·Hamid Reza TaghiyariHabib Zolfaghari

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